GPT and osteosarcoma: Telomerase and ALT in some cancer types (glioblastoma multiforme [7], osteosarcomas [8], soft tissue sarcomas [44], liposarcomas [45], fibrous histyocytomas [38], peritoneal mesothelioma [46], adrenocortical carcinoma [26], gastric carcinomas [41]) may coexist [47].